Plenty of celebrities are beauty adventurers, constantly reinventing their looks (cough, Madonna, cough). But then there are the few who fall into an entirely different camp: the ones who find a look they like and stick to it unwaveringly, no matter what. On the rare occasions they do depart from their signature—be it a certain hair color or a makeup choice—they're often nearly unrecognizable. Here, a glimpse at what 20 celebrities look like without their iconic beauty trademarks.

The Grammys seem to bring out the crazy in celebrities—at least when it comes to their fashion and beauty choices. Here, a roundup of the most memorable (and not in a good way) Grammy looks from the past 15 years.

At any given moment during my middle-school years, one could spot an Avril Lavigne clone roaming the halls. The telltale signs: heavy black eyeliner; Converse sneakers; long, stick-straight hair; and a haphazardly looped necktie....